20,817 research outputs found
Extending conceptualisations of the diversity and value of extracurricular activities: a cultural capital approach to graduate outcomes
This report presents the findings from the research project Extending conceptualisations of the diversity and value of extra curricular activities: a cultural capital approach to graduate outcomes. Very little research has directly addressed the question of what constitutes extra-curricular activities (ECA), the extent to which students engage in ECA, and how students experience and conceptualise benefits from their engagement. Nor is there research that looks at how staff understand ECA. This research sought to address these questions from a cultural capital approach. Traditionally conceived ECA include campus-based cultural and sporting activities and volunteering. An awareness is required of the fact that many students work for economic reasons, continue their faith and caring activities, and continue to live at home. The researchers were interested in the possible differential recognition and valuing of activities undertaken by different groups of students. This research explores issues of inter-generational capital that might shape both the capacities to participate and how students understood the benefits
Extra-Curricular Activities: creating graduates with impact in education
Staff from the Carnegie Faculty’s Centre for Social and Educational Research across the Life-course (SERL) have completed a project for the Higher Education Academy subject group for education, ESCalate, into ‘Creating Graduates with Impact in Education’. Jacqueline Stevenson, Professor Sue Clegg and Paula Sealey undertook research with students and staff across a range of education-related courses as well as with employers from schools, local authorities and other education settings
Study of noise reduction characteristics of composite fiber-reinforced panels, interior panel configurations, and the application of the tuned damper concept
The application of fiber reinforced composite materials, such as graphite epoxy and Kevlar, for secondary or primary structures developing in the commercial airplane industry was investigated. A composite panel program was initiated to study the effects of some of the parameters that affect noise reduction of these panels. The fiber materials and the ply orientation were chosen to be variables in the test program. It was found that increasing the damping characteristics of a structural panel will reduce the vibration amplitudes at resonant frequencies with attendant reductions in sound reduction. Test results for a dynamic absorber, a tuned damper, are presented and evaluated
Melting and differentiation in Venus with a cold start: A mechanism of the thin crust formation
Recent works argue that the venusian crust is thin: less than 10-30 km. However, any convective model of Venus unavoidably predicts melting and a fast growth of the basaltic crust, up to its maximum thickness of about 70 km limited, by the gabbro-eclogite phase transition. The crust is highly buoyant due to both its composition and temperature and it is problematic to find a mechanism providing its effective recycling and thinning in the absence of plate tectonics. There are different ways to solve this contradiction. This study suggests that a thin crust can be produced during the entire evolution of Venus if Venus avoided giant impacts
Aircraft control system
An aircraft control system is described which is particularly suited to rotary wing aircraft. Longitudinal acceleration and course rate commands are derived from a manual control stick to control translational velocity of the aircraft along a flight path. In the collective channel the manual controls provide vertical velocity commands. In the yaw channel the manual controls provide sideslip or heading rate commands at high or low airspeeds, respectively. The control system permits pilots to fly along prescribed flight paths in a precise manner with relatively low work load
Demand for satellite-provided domestic communications services up to the year 2000
Three fixed service telecommunications demand assessment studies were completed for NASA by The Western Union Telegraph Company and the U.S. Telephone and Telegraph Corporation. They provided forecasts of the total U.S. domestic demand, from 1980 to the year 2000, for voice, data, and video services. That portion that is technically and economically suitable for transmission by satellite systems, both large trunking systems and customer premises services (CPS) systems was also estimated. In order to provide a single set of forecasts a NASA synthesis of the above studies was conducted. The services, associated forecast techniques, and data bases employed by both contractors were examined, those elements of each judged to be the most appropriate were selected, and new forecasts were made. The demand for voice, data, and video services was first forecast in fundamental units of call-seconds, bits/year, and channels, respectively. Transmission technology characteristics and capabilities were then forecast, and the fundamental demand converted to an equivalent transmission capacity. The potential demand for satellite-provided services was found to grow by a factor of 6, from 400 to 2400 equivalent 36 MHz satellite transponders over the 20-year period. About 80 percent of this was found to be more appropriate for trunking systems and 20 percent CPS
The clinical effectiveness and cost-effectiveness of inhaler devices used in the routine management of chronic asthma in older children: a systematic review and economic evaluation
Background:
This review examines the clinical effectiveness and
cost-effectiveness of hand-held inhalers to deliver
medication for the routine management of chronic
asthma in children aged between 5 and 15 years.
Asthma is a common disease of the airways, with a
prevalence of treated asthma in 5–15-year-olds of
around 12% and an actual prevalence in the community
as high as 23%. Treatment for the condition
is predominantly by inhalation of medication. There
are three main types of inhaler device, pressurised
metered dose, breath actuated, and dry powder, with
the option of the attachment of a spacer to the first
two devices under some prescribed circumstances.
Two recent reviews have examined the clinical and
cost-effectiveness evidence on inhaler devices, but
one was for children aged under 5 years and the
comparison in the second was made between pressurised
metered dose inhalers and other types only.
Objectives:
This review examines the clinical effectiveness and
cost-effectiveness of manual pressurised metered
dose inhalers, breath-actuated metered dose
inhalers, and breath-actuated dry powder inhalers,
with and without spacers as appropriate, to deliver
medication for the routine management of chronic
asthma in children aged between 5 and 15 years.
Methods:
Two previous HTA reviews have compared the
effectiveness of inhaler devices, one focusing on
asthma in children aged under 5 years and the
other on asthma and chronic obstructive airways
disease in all age groups. For the current review, a
literature search was carried out to identify all
evidence relating to the use of inhalers in older
children with chronic asthma. A search of in-vitro
studies undertaken for one of the previous reviews
was also updated.
The data sources used were: 15 electronic bibliographic
databases; the reference lists of one of the
previous HTA reports and other relevant articles;
health services research-related internet resources;
and all sponsor submissions.
Studies were selected according to strict inclusion
and exclusion criteria, and relevant information
concerning effectiveness and patient compliance
and preference was extracted directly on to an
extraction/evidence table. Quality assurance
was monitored.
Economic evaluation was undertaken by reviewing
existing cost-effective evidence. Further economic
modelling was carried out, and tables constructed
to determine device cost-minimisation and
incremental quality-adjusted life-year (QALY)
thresholds between devices.
Results:
Number and quality of studies, and
direction of evidence:
Fourteen randomised controlled studies were
identified relating to the clinical effectiveness of
inhaler devices for delivering β2-agonists. A further
five were on devices delivering corticosteroids and
one concerned the delivery of cromoglicate.
Overall, there were no differences in clinical
efficacy between inhaler devices, but a pressurised
metered dose inhaler with a spacer would appear
to be more effective than one without. These
findings endorse those of a previous HTA review
but extend them to other inhaler devices.
Seven randomised controlled trials examined the
impact on clinical effectiveness of using a nonchlorofluorocarbon
(CFC) propellant in place of
a CFC propellant in metered dose inhalers, both
pressurised and breath activated, although only one
study considered the latter type. No differences were
found between inhalers containing either propellant.
A further 30 studies of varying quality, from 12 randomised
controlled trials to non-controlled studies,
were identified that concerned the impact of use
by, and preference for, inhaler type, and treatment
adherence in children. Differences between the
studies, and limitations in comparative data between
various inhaler device types, make it difficult to draw
any firm conclusions from this evidence.
Summary of benefits:
No obvious benefits for one inhaler device type
over another for use in children aged 5–15 years
were identified.
Costs and cost per quality-adjusted
life-year:
Two approaches have been taken: cost-minimisation
and QALY threshold. In the QALY threshold
approach, additional QALYs that each device must
produce compared with a cheaper device to achieve
an acceptable cost per QALY were calculated. Using
the cheapest and most expensive devices for delivering
200 μg of beclometasone per day, assuming no
cost offset for any device, and a threshold of £5000,
the largest QALY needed was 0.00807. With such
a small QALY increase, no intervention can be
categorically rejected as not cost-effective.
Conclusions:
Generalisability of findings:
On the available evidence there are no obvious
benefits for one inhaler device over another
when used by children aged 5–15 years with
chronic asthma. However, the evidence, in the
majority of cases, was compiled on children
with mild to moderate asthma and restricted
to a limited number of drugs. Therefore the
findings may not be generalisable to those at
the more severe end of the spectrum of the
disease or to inhaler devices delivering some
of the drugs used in the management of asthma.
Need for further research:
Many of the previous studies are likely to
have been underpowered. Further clinical
trials with a robust methodology, sufficient
power and qualitative components are needed
to demonstrate any differences in clinical
resource use and patients’ asthma symptoms.
Further studies should also include the
behavioural aspects of patients towards their
medication and its delivery mechanisms.
It is acknowledged that sufficient power may
prove impractical owing to the large numbers
of patients required
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